Some Mac OS users may know something about KeyCastr - an open-source, real-time keystroke displaying application, which can be used to assist recording a variety of demonstration videos. However, no software like KeyCastr could satisfy us ideally (including Carnac) on Windows, until the appearance of KeyCastOW (short for KeyCast On Windows), developed by Brook Hong from China.

As an alternative to the most commonly used PDF document format at present, the advantages of DjVu format (from France) are quite obvious: on the premise of storing the same content with same quality, it is much smaller, more readable and opens much faster than PDF. In this case, for any PDF documents with large file size, we might as well convert them into DjVu format, so as to get more convenience.

As the name suggests, Zemana AntiMalware is a small, fast and powerful malware/adware/ransomware/spyware scanner & remover from Turkey. It is designed to assist antivirus (compatible with all existing antivirus software), in order to make your computer more secure.

For learning or formal development of C#, there are only two best IDE for choice at present: either the 10+ GB size of Visual Studio or SharpDevelop with only 10+ MB file size. The latter is an open-source IDE with layout similar to IDEA for Java and high flexibility & extensibility, which lets a user find everything new and fresh. It never wants to be an IDE that tries to support everything as Eclipse. Instead, it just gives you an interface, and you can do all the rest by yourself.

The original design intent of Universal Extractor is to provide a simple and convenient way to extract files from installation packages (Inno Setup or Windows Installer package, for example), without having to use the command line every time. Afterwards, it gradually evolved into a universal extractor that can automatically extract files from almost any type of archivers with one click, no need to consider their source, compression method, etc.